Celtic have won last four Scottish Cups
Falkirk currently leading League 1
Forrest & Griffiths start for Celtic; Falkirk make eight changes
Forrest nets deflected strike to finally breach visitors after break
Christie quickly doubles lead with drive into bottom corner
Substitute Elyounoussi lofts ball over keeper from close range
Kilmarnock are in a comfortable position at the break thanks to Kyle Lafferty's double.
He won and converted a penalty for the opener and quickly added a second from open play.
Image source, SNSLafferty made no mistake from 12 yards
Partick Thistle have been by far the better side and may actually be kicking themselves not to be leading by more than one goal.
Scott Tiffoney headed them in front and Brian Graham and Shea Gordon have missed good chances, while the Jags also have a strong penalty shout turned down.
Weak headers from Callum Butcher and Adrian Sporle apart, there's not been much from United.
Lewis Vaughan's wonderful free-kick is the difference between the two sides at the break and Raith Rovers could be about to take a Premiership scalp.
Livingston have threatened through Jay Emmanuel-Thomas and Craig Sibbald.
It's been a relatively open game, with both goalkeepers called into action on a number of occasions.
St Johnstone are in front thanks to a smart Guy Melamed finish, following good work from Stevie May.
Declan McDaid and Charlie Adam have gone close with shots for Dundee and a long-range dig from Paul McMullen struck the crossbar.
Melamed could have had a second goal but goalkeeper Adam Legzdins did well to save at the striker's feet.
Image source, SNSGuy Melamed (left) opened the scoring at Dens Park
After a nervy opening half hour, the top-flight side managed to break the deadlock through two quickfire goals from Christopher Long and Jordan Roberts.
Paul Lawson's men looked fairly comfortable until Long's opener, despite conceding the majority of possession, but two goals in six minutes from Graham Alexander's side has this one all but done.
Image source, SNSDundee United 0-1 Partick Thistle
Brian Graham somehow fails to make it 2-0 to Partick Thistle. Shea Gordon's cut-back lays it on a plate for him, but he slides it past the post.
Then they have another big chance. Shea Gordon is always stretching as he races onto a free-kick and flicks it across the goal.
Image source, SNSPartick Thistle's Scott Tiffoney scores to make it 1-0
Jamie McGrath's sublime early goal has St Mirren on course for the fourth round after an entraining first half.
The visitors could have been out of sight in the opening 20 minutes, but an improved Hamilton stemmed the tide and could have bagged an equaliser.
All to play for in the second half.
Image source, SNSJamie McGrath's lovely lob put St Mirren in front
Hamilton Academical 0-1 St Mirren
Accies have a good chance to haul themselves level shortly before half-time, but Ross Callaghan screws his shot wide from 10 yards.
Kyle Lafferty
Make that five goals in three games for Kyle Lafferty as the Kilmarnock forward converts Rory McKenzie's cross with a cool finish.
Image source, BBC SportJordan Roberts
Huge uphill task for the hosts now as Graham Alexander's men double their lead.
Nathan McGinley's cross from the left eventually falls to Roberts, who smashes home a second.
Image source, BBC SportFormartine United 0-1 Motherwell
Visitors Well come within inches of doubling their lead as Steven Lawless' cross is met with a delightful flick off the heel of Allan Campbell's boot, but it curls just wide.
Hamilton Academical 0-1 St Mirren
The hosts are forced into a first-half change as Scott Martin limps off, with Jamie Hamilton on in his place.
Dundee 0-1 St Johnstone
Saints goalkeeper Zander Clark is rooted to the spot as a dipping, long-range shot from Paul McMullen cracks off the top of the crossbar.
Kyle Lafferty (penalty)
Kilmarnock have the lead after Kyle Lafferty wins and converts a penalty.
Jonathan Tiffoney was penalised and the Northern Ireland international netted his fourth goal in three games.
Image source, BBC SportChristopher Long
The Premiership side breathe a sigh of relief as they finally break down the Highland League outfit.
It comes from nothing as Formartine keeper Kevin Main attempts to come for a hopeful Declan Gallagher punt upfield, but Long gets to the ball first and manages to finish.
Image source, BBC SportDundee 0-1 St Johnstone
A lovely touch from Stevie May gets the Saints striker in behind the home defence and he is bundled over by a Lee Ashcroft challenge just as he shapes to shoot.
May and his team-mates all want a spot-kick, but the officials are not interested.
Stenhousemuir 0-0 Kilmarnock
A clash of heads between Stenhousemuir's Mark McGuigan and Kilmarnock's Zech Medley brings a pause to play at Ochilview.
McGuigan plays on with a bandage, while on-loan Arsenal defender Medley makes way for Zeno Ibsen Rossi, himself on loan from Bournemouth.
Graham Webster
A 10th goal of the season from Graham Webster brings Montrose level.
It's a bit of a thriller up in the north east.
Image source, BBC SportHamilton Academical 0-1 St Mirren
Hamilton's first shot on goal nearly brings them level.
Lee Hodson's effort from the 18-yard line packs plenty of power, but goalkeeper Jak Alnwick makes a terrific stop to tip it over the bar.
Moment later, Hakeem Odoffin curls one a yard past the post as the hosts show signs of improvement after a torrid start.
Stenhousemuir 0-0 Kilmarnock
Kilmarnock are putting hosts Stenhousemuir under pressure with Chris Burke, Kirk Broadfoot and Kyle Lafferty all forcing saves from goalkeeper Paddy Martin, with Mitch Pinnock and Rory McKenzie off target with their efforts.
Image source, SNS